919489720319 has 4 divisors (see below), whose sum is σ = 973577350944. Its totient is φ = 865402089696.

The previous prime is 919489720309. The next prime is 919489720339. The reversal of 919489720319 is 913027984919.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 919489720319 - 2⁸ = 919489720063 is a prime.

It is a super-2 number, since 2×919489720319² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919489720309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27043815287 + ... + 27043815320.

It is an arithmetic number, because the mean of its divisors is an integer number (243394337736).

Almost surely, 2^919489720319 is an apocalyptic number.

919489720319 is a deficient number, since it is larger than the sum of its proper divisors (54087630625).

919489720319 is a wasteful number, since it uses less digits than its factorization.

919489720319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54087630624.

The product of its (nonzero) digits is 8817984, while the sum is 62.

The spelling of 919489720319 in words is "nine hundred nineteen billion, four hundred eighty-nine million, seven hundred twenty thousand, three hundred nineteen".